Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc6b7df175cf4db…

MALICIOUS

PDF

46.7 KB Created: 2020-08-29 03:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3452751a76adab9d2c5266db71a53be8 SHA-1: 3a0048320b527da8a7d4cd53c7a91a55bfc95651 SHA-256: 2dc6b7df175cf4db498a66312da7c62464fdd550bfc0e5216813cb7c24bf1d29
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=the+white+crow+download'. The document body also contains this URL along with numerous other PDF links, suggesting a link farm designed to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=the+white+crow+download
    • https://static.usrfiles.com/ugd/b8c837_a758d134404a45d2b039a9c8f01d132b.pdf
    • https://static.usrfiles.com/ugd/b8c837_da332fba4c2d416aa22f94bcbf61e122.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb3b2affd0d54926af29c3c74cd786f5.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/vimemiwabewoxosog.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/alternative_energy_sources_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/renewal_of_tenancy_agreement_letter_template_nz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/61316903275.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/88332258006.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/9853837673.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/aha_dietary_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5243/files/celebrity_endorsement_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/godrej_industries_annual_report_2017.pdf
    • https://static.usrfiles.com/ugd/b8c837_60ba5be9e81e4bdf9057e0ef88e496fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_89af1cebea5c4564bcfc073afd3a64d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f241eb9db7644141ace89f25ad2568df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fe25d6526324c378ceb3e72ea834f89.pdf
    • https://static.usrfiles.com/ugd/b8c837_a774790d1eb845b6b43a5df8a41c0fc1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006090.bin
8ec2ccf36d15cba8721a3fbe45001c2a2bb5057b31151ee6ea65e7b4f8680157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 4888 bytes
font_01_sfnt_off00007134.bin
3db42be38b7303ed832ccab8d05148ecd7b33b6fed77280115ad87fb1a7df4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7134 11788 bytes
font_02_sfnt_off000097cd.bin
4e74c91031341c06b915725d15f052d77c33d75b7b3102a675f469d94d5ad539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97CD 16396 bytes

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